From the demo January 16, 2010. Recipe courtesy of Nancy Zaslavsky. Makes about 20 tacos. 2 tablespoons olive oil 2 pounds large shrimp — cleaned, shelled and cut into large pieces 1 pound tomatillos 1 large (3-inches) white onion 6 cloves garlic 1 or 2 fresh green jalapeño or serrano chiles [...]